1 //===- LoongArchMatInt.cpp - Immediate materialisation ---------*- C++ -*--===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "LoongArchMatInt.h" 10 #include "MCTargetDesc/LoongArchMCTargetDesc.h" 11 #include "llvm/Support/MathExtras.h" 12 13 using namespace llvm; 14 15 LoongArchMatInt::InstSeq LoongArchMatInt::generateInstSeq(int64_t Val) { 16 // Val: 17 // | hi32 | lo32 | 18 // +-----------+------------------+------------------+-----------+ 19 // | Highest12 | Higher20 | Hi20 | Lo12 | 20 // +-----------+------------------+------------------+-----------+ 21 // 63 52 51 32 31 12 11 0 22 // 23 const int64_t Highest12 = Val >> 52 & 0xFFF; 24 const int64_t Higher20 = Val >> 32 & 0xFFFFF; 25 const int64_t Hi20 = Val >> 12 & 0xFFFFF; 26 const int64_t Lo12 = Val & 0xFFF; 27 InstSeq Insts; 28 29 if (Highest12 != 0 && SignExtend64<52>(Val) == 0) { 30 Insts.push_back(Inst(LoongArch::LU52I_D, SignExtend64<12>(Highest12))); 31 return Insts; 32 } 33 34 if (Hi20 == 0) 35 Insts.push_back(Inst(LoongArch::ORI, Lo12)); 36 else if (SignExtend32<1>(Lo12 >> 11) == SignExtend32<20>(Hi20)) 37 Insts.push_back(Inst(LoongArch::ADDI_W, SignExtend64<12>(Lo12))); 38 else { 39 Insts.push_back(Inst(LoongArch::LU12I_W, SignExtend64<20>(Hi20))); 40 if (Lo12 != 0) 41 Insts.push_back(Inst(LoongArch::ORI, Lo12)); 42 } 43 44 if (SignExtend32<1>(Hi20 >> 19) != SignExtend32<20>(Higher20)) 45 Insts.push_back(Inst(LoongArch::LU32I_D, SignExtend64<20>(Higher20))); 46 47 if (SignExtend32<1>(Higher20 >> 19) != SignExtend32<12>(Highest12)) 48 Insts.push_back(Inst(LoongArch::LU52I_D, SignExtend64<12>(Highest12))); 49 50 return Insts; 51 } 52